We've got a load remover for Jazzpunk. The whole thing is >temporary< as Fatalis (the author) is working on implementing the auto splitter into the load remover. It is very accurate and will remove all level loads. This only accounts to a few seconds and the latest patch has certainly removed a large chunk of the initital loading times but it might also work with patchless, where this is a huge improvement overall.

You can find the .asl file under "Resources" or here: https://www.dropbox.com/s/z2frvbq921lqyp4/gistfile1.asl

Quick install guide:

• Add "scriptable auto splitter" to your Livesplit layout
• Load the .asl file
• Make sure you compare against Game Time rather than Real Time

Full install guide:

• Download the .asl file above.
  • Ideally, save it under X:\Livesplit\LiveSplit_1.6.9\Components
• Open Livesplit, right click, edit layout, then add "Scriptable Auto Splitter" as a new component:
• Double click "Scriptable Auto Splitter", click "Browse" and load in the .asl file:
• Make sure to save your layout
• Make sure to compare against Game Time: